Tube.



P. J. GROUVELLE, E. H. ARQUEMBOURG & L. J. JORBT.

TUBE.

APPLICATION FILED APR. 27, 1906. 910, 192. Patented Jan. 19, 1909.

1 2 SHEETS-SHEET l.

P. J. GROUVELLE, E. H. ARQUEMBOURG & L. J. JORET.

TUBE.

APPLICATION FILED APB..27, 1906.

910,192. Patented Jan. 19, 1909.

2 SHEETS-SHEET 2.

Fig.25. Tigfifi. .21.

" PHILIPPE JULES eRoUvELLE, EMILE HENRI-ARQUEMBOURG, AND fiEoN JEAN g rams, FRANCE.

. uNitrEDstrAT-ns PATENT OFFICE.

JORET, or

TUBE.

'of France, have invented Tubes, of which the following is 'afull, clear, and exact description. T

In certain apparatus such as exhausters, injectors, ejectors, elevators for grain-or pulverulent matters, tubes are employed'of gencral bi-conic form and of various shapes.

Thcse bi-conic tubes have recently received a new application in the construction of radiators known as honeycomb" employed on automobile carriages. cial advantages and particular results Which they enable to be realized, these tubes present the inconvenience of being rather difficult and relatively costly to manufacture, particularly in the case'of radiators which require a great number of them. The increase in effect of these bi-conic tubes is due, in fact to the progressiveness with which the speed of the fluid, which traverses them, increases in passing from the entry section to the contracted section, then diminishes in passing from the contracted section to the outlet section. A suitable relation should however exist between the various elements which constitute the bi-conic tube, that is to say, between the entry section, the contracted section, the position of this section withrelationto the length of the tube, the length of the tube itself, etc. Experience demonstrates, in fact, that it is nowise indispensable that the section of the tube be circular, nor even that the form of the section be the same entirely throughout the length of the tube, provided that the sections diminish and increase progressively and that the various tube.

proportions, just referred to above, be suitably observed.

The mode of manufacture is represented,

drawings, in which: t

Figure 1 is a longitudinal elevation of the Figs. 2, 3 and 4 represent sections made on the lines A.A, BB and CC of Fig. 1.

' Specification of Letters Patent Application filed Apri1 27, 1906. Serial No.'314',0 48.

all of 71 Rue 'du- Aside from spe-' y way of example, in the accompanying Q i Patentedfl'an. 19. 909.

'- This mode of manufacture consists in producing, at the desired position, the contracted or minimum section of, a square tube, ,by in. wardly stamping the faces of this tube ac-' cording to a shape determined in advance and represented in the section A-A (Fig. 2). The junction'between the section CC and the square sections of the ends, is effected imperceptibly by a series of intermediate forms, such as that represented bythe section B-B (Fig. 3). o

Figs. 5, 6, 7 and 8 show a modification of the mode of junction betweemthe contracted section C+G andth e square section A-A. Fig. 5 isa longitudinal View and Figs. 6, 7 and 8 cross sections made respectively on the lines A-A', B-B and C'C' of Fig. 5.

Themode of junction has no importance in itself provided that the passage from one section to another be progressively obtained.

Fig.9 shows in elevation, Fig. 10 in under side view, and Fig. 11 in perspective, a biconic tube the contracted section of which is obtained, in one direction, by the stamping of two faces of the tube according to the mode already indicated in Figs. 1 and 4 and in the other directionby simple compression of the tube.

Figs. 12, 13 and 14 show respectively the sections AL -A B --l3 and C -C of the tube thus obtained.

Finally, Figs. 15 to'19 show various examples of the contracted section which can be obtained by starting with a tube of s uare section, the four faces of which are mo ified by stamping or pressing. I

Figs. 20 to 24: represent analogous sections obtained by acting only on two faces of the square tube.

Figs. 25 to 28 show various contracted sections obtained by starting with a tube of circular section stamped or pressed at three or four points of its circumference.

Figs. 29, 30 and 31 represent analogous sections obtained by acting only on two points of the circumference.

It would be possible, based on the same principles to imagine an. infinity of'other.

forms derived from tubes of square or round section or even from tubes of OIlg'lIlfil rec- 4 tan ular triangular hexagonal polygonal The foregomg 'sp c fidat q of 0111 tubes v elligtic gm, ti r I signed by us this 17 th day of Aprily1906. We claim Z j PHILIPPE JULES GROUVELLE. A tubehavmg gradually decreased capaclty r a a EMILE HENRI ARQUEMBOURG.

5 from its ends towards its center, the sides of LEON JEAN JORE'I.

the tube having depresslons, the cross sec.- W1tnes ses: Y tional area of which gradually 1I1CI'QBJ6S tq- AUGUSTUS 'E. INGRAM;

Ward their longitudinalcenter. T MAURICE H. PIQGNET. 1 

